Major release 0.21.0 for open-beta phase

[jon-heard]

This major release contains a few changes that may be incompatible with existing shortcuts and/or shortcut-files. I'll try to make this the only such release. I have posted some simple steps to resolve any incompatibilities.

The two biggest changes in this release are:

• The plugin's name is changing. This was in response to some confusion with a similarly named plugin. The new name is Inline Scripts.
• The addition of auto-complete for shortcuts. This feature makes it easier to remember shortcuts and type them quickly and correctly.

For a full list of changes, check the release notes.